33 Science -- Invertebrates

Why pupa killed inside the cocoon during extraction of the silk thread? Give any 2 reasons.

Why pupa killed inside the cocoon during extraction of the silk thread? Give any 2 reasons.

The pupa are killed inside the cocoon during extraction of the silk thread because:
    - If we allowed them to hatch them they would cut the silk thread on emerging.
    - It make enable to hard sericin portion to get softened.

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